LumenRT U5 - Missing stereo option in save Image - Format - 360 VR Panorama

When I try to create a  stereoscopic Spherical image in LumenRT, I see the stereo option is not available.

This option is only available with the standard format, but the result of this option is not usable with VR goggles:

Am I doing something wrong, or is this a bug?

Regards Louis